Acoustic Analysis of PD Speech

Table 3

Bilabial within- and between-utterance syllable rate variability by group. The first row shows within-utterance relative deviation or syllable rate. The second row shows between-utterance, within-session mean syllable rate relative deviation. All results are averaged across all sessions of the indicated participant group.

Variability type	Normals	Patients, off-stim	Patients, on-stim
Within-utterance	0.200	0.251	0.558
Between-utterance	0.066	0.083	0.152